I tried to link my site hosted in wordpress.com (a blog with a custom domain) with my Google Plus account. I followed steps carefully but when I tested with Google Rich Snippets Tool (http://www.google.com/webmasters/tools/richsnippets), I got some warnings:
Warning: At least one field must be set for HatomEntry.
Warning: Missing required field “entry-title”.
Warning: Missing required field “updated”.
Warning: Missing required hCard “author”.
What does those warnings mean? Can I fix then in wordpress.com?